The research goal of this study was a comparative investigation of ring-shake on the cell level in wood samples with and without a crack. The anatomical and chemical investigation were conducted in six exclusive sample selections, representing six Castanea sativa Mill. trees from three differently managed plots. Depending on the used measurement techniques the number of single measurements varied between 10² and 104 values. A statistical analysis of microscopical data was conducted to investigate the differences between samples with and without crack. No clear tendencies could be revealed. The analysis of box plots for the samples with cracks showed a higher mean variability of earlywood- and latewood-vessel diameters. An
increase of the cell wall thickness of the libriform-fibres within the latewood was found too. The higher variability of wood density in cracked samples was also observed by a computed tomography. The results lead to the hypothesis that the variability of the mean values of the earlywood- and the latewood-vessel diameters as well as the thickness of the libriform-fibres in the latewood could be explained
by the variability of the wood density within the radially gradient. An UMSP-investigation revealed significantly higher lignin content in two of three cracked samples. This could be a possible cause for high brittleness and anisotropy of the xylem.